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The power of a motor is 40kW. At what speed can the motor raise a load of 20,000 N?
The power of a motor is 40kW. At what speed can the motor raise a load of 20,000 N?
Class 10 | ICSE | Physics | Selina | Work Energy
The power of a motor is 40kW. At what speed can the motor raise a load of 20,000 N?

Solutions:

According to the question –

Power is 40 kW

Force is 20,000 N

Expression for power is –

Power = force × velocity

Upon re-arranging we get the expression –

Velocity = power / force = 40 kW/ 20,000

= 40,000 / 20,000 = 2 m / s

Velocity = 2 ms-1

i

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